Music is these three boys lives. They play their music in search of the "perfect" show. As they progress they get closer and closer but never reaching it beacuse that would be impossible. If their ever was or will be a "perfect" show, I'm sure these boys have played it or will in the future.
For physical events that happen at a specific time. For example a concert, or dance performance. If there are multiple shows, you can still duplicate your event to cover them all.